Features: Whistle detecting camera. Whistle to start and stop video recording (Pro version). Hidden Camera, let you take secret pictures while your screen is off (Pro version). High quality pictures. Auto focus. Easy holding and taking pictures just with one hand. Selfie pictures using camera countdown. All orientation supported. A very useful, private, and fast pictures gallery. Share your photos (Facebook, WhatsApp, Mail). In order to enforce third party privacy license, When recording in hidden camera mode, you'll see a red record indicator at the upper left corner of the screen. also, shutter sound cannot be turned off. Do not use hidden camera for any illegal activity! DreamBit is not responsible for any inappropriate use of its application. If you can't whistle, try to set sensitivity to level 1 with larger frequency range and make noises "like" you are whistling, that should do the trick. eMail us for any problem or request.